My question is: Am I broking GPL 2.0? Do I do anything wrong ligally or ethically?

This question will lead to several questions:
What's software?
Code/compiled code?
or
Code + Documentation + Installation
If the first:
Do little modifications made for specific software deserves a copyright notice?
If the second:
Does the (About) dialog represent the executable program or the product as a
whole: executable + documentation + installation

Best regards,
- Anas R.

You're doing nothing wrong legally, as to the ethics question, you must first
determine how long a stick is.

Whose ethics? Yours? Mine? Eben Moglen?
Eben spins absolute legal nonsense to thousands of programmer's in the form of

socialist propaganda masquerading as "legal guidance" from the SFLC. For
misleading these people he collects $262K/year from the public's charitable
contributions. Is this "ethical"?

The GPL license is an illegal attempt to wrest control of copyright law from the
decisions of a democratically elected body (Congress). The programmers who use
the GPL have laudable charitable intentions at heart. (The GPL is a third party
donee beneficiary contract that confers its purported license benefits on the
general public).

-- There is a fundamental principle of contract law prohibiting the parties to a
contract from binding nonparties. See, e.g., EEOC v. Waffle House, Inc., 534
U.S. 279, 294 (2002) (“It goes without saying that a contract cannot bind a
nonparty.”). --